US1591228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of heat control
Assignee: POTTER RADIATOR Corp
•
Filing: 1922-01-30
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Granted: 1926-07-06
•
Expires: 1942-01-30
Abstract
No abstract record available.
Inventors
- 👤 Francis W Obenhaus
- 👤 George R Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:39
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F24H15/00; F24H15/20; F24H15/281; F24H15/30; F24H15/305; F24H15/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-07-05 | 1930-01-04 | 1930-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-07-05 | 1934-01-04 | 1934-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-07-05 | 1938-01-04 | 1938-07-06 | $7700.00 | Window Closed / Lapsed |